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Define electron gain enthalpy. Explain w...

Define electron gain enthalpy. Explain why electron gain enthalpies of some elements are positive. How does electron gain enthalpy vary in a group and in a period ?

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Electron gain enthalpies of noble gases are negative.

Which pair of elements shows positive elecron gain enthalpy ?

The element with positive electron gain enthalpy is

Why do noble gases have positive electron gain enthalpies?

In Group 18, the element with highest electron gain enthalpy is

Electron gain enthalpy will be positive in

Match the correct ionisation enthalpies and electron gain enthalpies of the following elements.

Define electronegativity. How does it differ from electron gain enthalpy?

Statement-1 : First electron gain enthalpy is alway -ve for an element. Statement-2 : Magnitude of electron gain enthalpy irregularly increases from left to right in a period.

S has more negative electron gain enthalpy than O why ?

ICSE-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-ESSAY (LONG ANSWER) TYPE QUESTIONS
  1. What do you understand by the term periodicity ? What is the main caus...

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  2. What do you understand by the term periodicity ? What is the main caus...

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  3. What do you understand by the term periodicity ? What is the main caus...

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  4. What do you understand by the term periodicity ? What is the main caus...

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  5. Define various types of atomic radii. Why is covalent radius smaller t...

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  6. What do you understand by first, second and third ionisation energies ...

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  7. Define electron gain enthalpy. Explain why electron gain enthalpies of...

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  8. Electron gain enthalpies of noble gases are negative.

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  9. Explain why : The electron affinities of Be and Mg are zero.

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  10. Which is more basic : LiOH or NaOH ?

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  11. Explain why : The second ionisation energy of Li is very high.

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  12. Write short notes on the following : Penetration effect

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  13. Write short notes on the following : lsoelectronic ions

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  14. Write short notes on the following : Periodic trends in melting and...

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  15. The electronic configuration of some elements are given below: (i) 1...

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  16. The electronic configuration of some elements are given below: (i) 1...

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  17. The electronic configuration of some elements are given below: (i) 1...

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  18. The electronic configuration of some elements are given below: (i) 1...

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  19. The electronic configuration of some elements are given below: (i) 1...

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  20. The electronic configuration of some elements are given below: (i) 1...

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